Commands aided in helping plan builds in Seablock specifically, but some can be helpful elsewhere
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
https://mods.factorio.com/mod/SeablockPlanningTools
Because there's zero information about what this actually does on this mod page, and no link to the original, and the search defaults to hiding deprecated/outdated mods so it took me way too long to find.